Chem

Suppose that you want to construct a galvanic cell from nickel and cadmium. You use 0.01M sol of cadmium nitrate as one of the electrolytes. If you need a cell potential of 0.17V for this system, what concentration of NiCl2 should you use?

  1. 👍
  2. 👎
  3. 👁
  1. The cell reaction will be
    Cd(s) + Ni^2+(aq) ==> Ni(s) + Cd(0.01M)

    step 1. Calculate the E value for the Cd part using
    E = Eo - (0.05916/n)*log (1/0.01) and the equation for the reduction of Cd^2+ to Cd(s) as in Cd^2+ + 2e ==> Cd(s). Now reverse the sign since you want the oxidation of Cd and not the reduction of Cd^2+.

    Step 2. The half cells for the first reaction I gave above are
    Cd(s)==> Cd^2+ + 2e .........E1 = from step 1
    Ni^2+ + 2e ==> Ni(s)............E 2= ?
    ---------------------------------------------
    Add to get Cd + Ni^2+ =>Cd^2+ + Ni E3 = 0.17 v.
    Now calculate E2 = ? from E1 + E2 = E3

    Step 3. Now you calculate the concentration of Ni^2+ from
    Ni^2+ + 2e ==> Ni and E = Eo - (0.05916/n)*log[1/(Ni)].
    Plug in Eo for Ni^2+ reduction, Eo is from the reduction tables, and E is the calculation from step 2 of E2. Solve for (Ni^2+).

    Post ALL of your work if you get stuck.

    1. 👍
    2. 👎
  2. Please kindly specify your instructions or just provide the answer. thanks

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    Write the standard cell notation for a galvanic cell with a silver cathode and a zinc anode.

  2. chemistry

    Write the equations describing the electrode reactions and the net cell reaction for this electrochemical cell containing indium and cadmium: This is what I have so far: anode: In(s) --> In^3+ + 3e- cathode: Cd^2+ + 2e- --> Cd (s)

  3. chemistry

    if you're given a chart of half cell potentials (reduction potentials), how can you figure out which metals produce the highest voltage? For ex. Cadmium (Cd) with copper (Cu) Silver (Ag) with zinc (Zn) Lead (Pb) with zinc (Zn)

  4. Gen Chemistry

    What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)|Al3+(aq)||Ni2+(aq)|Ni(s)

  1. Chemistry

    1. in galvanic cell, in what direction do positive ion migrate to maintain a neutral charge in the half- cells? 2. in galvanic cell, in what direction do negative ion migrate to maintain a neutral charge in the half- cells?

  2. Chemistry

    Little confusing!! I need help PLZ!!! Two half cells in a galvanic cell consist of one iron (Fe(s)) electrode in a solution of iron (II) sulphate (FeSO4(aq)) and a silver (Ag(s)) electrode in a silver nitrate solution. a. Assume

  3. chemistry- electrochemical cell

    What makes this an oxidation-reaction? 3Ag2S+2Al(s) -> Al2S3+6 Ag(s)? Write the half-reactions showing the oxidation and reduction reactions. Identify which is the oxidation reaction and which is the reduction reason. What is

  4. AP Chemistry!!!

    Explain the reaction that would occur in a galvanic cell between solutions of Al3+ and Pb2+. Identify the oxidation and reduction reactions and the location of each reaction. Then, use the standard reduction potential tables to

  1. Chemistry

    A nickel-cadmium electrochemical cell functions according to the following reaction: Cd+ Ni2+ → Cu2+ + Ni What is the standard cell potential of a nickel-cadmium electrochemical cell?

  2. riddle

    What two coins will make up 30 cents but you cannot use a nickel ? What two coins will make up 30 cents but you cannot use a nickel ? The way you phrased the question, there is no answer. The usual way the problem is worded is,

  3. chemistry

    using the metals aluminum and silver,give a diagram of a galvanic cell in a nitrate solution. include the anode and cathode half reaction, the cell voltage, the electron/ion flow.

  4. chemistry

    How does the voltage of a galvanic cell change, when there is a precipitate in the solution?

You can view more similar questions or ask a new question.